• 한국컴퓨터정보학회논문지
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• 제21권8호
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• pp.49-55
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• 2016

In this study, we proposed the social map system prototype for intelligent crime prevention. For developing the social map system prototype, functional requirements were derived through the analysis of related cases and preceding studies. Derived requirements are providing a variety of map-based safety information, using crowdsourcing data such as SNS, connecting to intelligent CCTV. To satisfy these requirements, the prototype is developed with four main menus: the integrated search menu including social media data, the safety map menu providing a variety of safety and danger information, the community map menu to collect safety and danger information from users, and the CCTV menu providing the link to intelligent CCTV. The social map for intelligent crime prevention in this study is expected to greatly enhance the safety of local community with the provision of prompt response to risk information, safe route, etc. through actual service and user participation.

• 한국응급구조학회지
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• 제24권2호
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• pp.99-109
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• 2020

Purpose: Alcohol intoxication is frequently observed in patients with brain hemorrhage. The purpose of this study was to determine whether intoxication affects the Korean Triage and Acuity Stage (KTAS) level and the emergency medical process in emergency departments. Methods: This study was a retrospective observational study enrolled 253 brain hemorrhage patients (47 of those intoxicated) who visited the emergency medical center on public EMS ambulance from January. 1, 2017 to April, 30, 2019. Data were collected through the electronic medical record (EMR). KTAS level and time to computerized tomography (CT) were compared to evaluate whether inebriation affects care and examination processes. All data were analyzed using SPSS program. Results: Of the 47 patients intoxicated patients, 85.1% were male, and 74.5% accompanied by trauma. Initial KTAS level showed significant differences (77.2%; p=.000) when the level 3,4 was not drunk. The average time taken from triage to CT scans showed a significant difference of 24.81±23.72 (min) when the drunken state was not 58.38±56.54 (min)(p=.000). Conclusion: In patients with brain hemorrhage admitted to ED from public EMS, undertriage and delay after initial assessment were detected in inebriated patients. Careful initial evaluation and prompt medical response should be considered for patients transported by EMS.

• International Journal of Fluid Machinery and Systems
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• 제3권4호
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• pp.352-359
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• 2010

In recent years, the market has shown increasing interest in pump-turbines. The prompt availability of pumped storage plants and the benefits to the power system achieved by peak lopping, providing reserve capacity, and rapid response in frequency control are providing a growing advantage. In this context, there is a need to develop pumpturbines that can reliably withstand dynamic operation modes, fast changes of discharge rate by adjusting the variable diffuser vanes, as well as fast changes from pumping to turbine operation. In the first part of the present study, various flow patterns linked to operation of a pump-turbine system are discussed. In this context, pump and turbine modes are presented separately and different load cases are shown in each operating mode. In order to create modern, competitive pump-turbine designs, this study further explains what design challenges should be considered in defining the geometry of a pump-turbine impeller. The second part of the paper describes an innovative, staggered approach to impeller development, applied to a low head pump-turbine project. The first level of the process consists of optimization strategies based on evolutionary algorithms together with 3D in-viscid flow analysis. In the next stage, the hydraulic behavior of both pump mode and turbine mode is evaluated by solving the full 3D Navier-Stokes equations in combination with a robust turbulence model. Finally, the progress in hydraulic design is demonstrated by model test results that show a significant improvement in hydraulic performance compared to an existing reference design.

• 한국정밀공학회지
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• 제23권8호
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• pp.64-71
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• 2006

In this paper, a uniform speed controller for an ultrasonic rotary motor is developed using the phase-difference method. The phase difference method uses traveling waves to drive the ultrasonic motor. The traveling waves are obtained by adding two standing waves that have a different phase to each other. A compact phase-difference driver system is designed and integrated by combining VCO(Voltage Controlled Oscillator) and phase shifter. Theoretically the relationship between the phase difference in time and the rotational speed of the ultrasonic motor is sine function, which is verified by experiments. Then a series of experiments under various loading conditions are conducted to characterize the motor's performance that is the relationship between the speed and torque. Proportional-integral control is adopted for the uniform speed control. The proportional control unit calculates the compensating phase-difference using the rotating speed which is measured by an encoder and fed back. Integral control is used to eliminate steady-state errors. Differential control for reducing overshoot is not used since the response of ultrasonic motor is prompt due to its low inertia and friction-driving characteristics. The developed controller demonstrates reasonable performance overcoming disturbing torque and the changes in material properties due to continuous usage.

• 한국지능시스템학회논문지
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• 제8권5호
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• pp.29-38
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• 1998

본 논문에서는 부하외란이 발생할 경우 2지역 전력계통의 부하주파수 제어 즉, 각 지역내의 주파수 및 연계선 조류편차가 허용치 내로 신속히 수렴하도록 하기 위하여 신경회로망 자기동조 PID 제어기를 제안하였다. 시뮬레이션에 사용된 신경회로망은 입력층에 2개, 중간층에 10개, 출력층에 3개의 뉴런으로 구성하였다. 2개의 입력층 뉴런은 시스템의 오차와 오차 변화율이 입력되게 하였고 출력층은 PID 제어기의 파라미터에 해당하는 3개의 뉴런으로 구성하였다.시뮬레이션 결과 본 논문에서 제안한 신경회로망 자기동조 PID 제어기는 종래의 제어기법(Optimal, PID)보다 동특성 응답과 제어 성능이 우수한 제어기임을 알 수 있었다.

• 영어영문학
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• 제64권2호
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• pp.171-185
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• 2018

Students and other new readers of modernist poetry often experience difficulty with the influential early work of Ezra Pound. Although these typically brief poems may appear (deceptively) simple, an understanding of the relationship between Imagism and Vorticism is crucial to reading-or teaching-them effectively, which in turn requires significant familiarity with relevant poetics theories as well as representative poems. This essay clarifies the complex relations Imagism and Vorticism as two distinct styles that are too often conflated to the detriment of an accurate understanding of either one (and, in consequence, of the later modernist poetry that builds on their discoveries). In order to elucidate the modernists' justification of free verse over traditional metrical composition, I begin with an elaboration of T. E. Hulme's 1911 theory of the "cheerful, dry, and sophisticated" modern classicism on which both Imagism and Vorticism were largely predicated, developing Hulme's important distinction between the version of classicism that is "static" (and gives rise to Imagism) and the one that is "dynamic" (and leads to Vorticism and beyond it). In the following two sections, I draw upon and synthesize a broad range of Pound's own poetics statements to reveal the evolution of first sound ("melopoeia") and then the image ("phanopoeia") throughout his early work. Although the body of this article is analytical and historical in nature, it concludes with a practical template prompt for a creative response assignment, appropriate to undergraduate and graduate students, designed to help new readers recognize for themselves how Vorticist art works and why it matters.

• International journal of advanced smart convergence
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• 제13권1호
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• pp.99-107
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• 2024

In AI image generation tools, most general users must use an effective prompt to craft queries or statements to elicit the desired response (image, result) from the AI model. But we are software engineers who focus on software processes. At the process's early stage, we use informal and formal requirement specifications. At this time, we adapt the natural language approach into requirement engineering and toon engineering. Most Generative AI tools do not produce the same image in the same query. The reason is that the same data asset is not used for the same query. To solve this problem, we intend to use informal requirement engineering and linguistics to create a toon. Therefore, we propose a sequence diagram and image generation mechanism by analyzing and applying key objects and attributes as an informal natural language requirement analysis. Identify morpheme and semantic roles by analyzing natural language through linguistic methods. Based on the analysis results, a sequence diagram and an image are generated through the diagram. We expect consistent image generation using the same image element asset through the proposed mechanism.

• 한국산업보건학회지
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• 제10권1호
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• pp.147-159
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• 2000

The NIOSH health hazard evaluation program (HHE program) was created in response to the mandate to determine the toxic effect and potential health hazard of workplace exposure, which is found in Occupational Safety and Health Act of 1970 and the Federal Mine Safety and Health Act of 1977, A primary benefit of HHE program is its ability to provide current health hazard data to employers and employees, which assists them in identifying solutions to occupational health and safety problems in their workplaces, The HHE program also stimulates research in the development and review of sampling methods and diagnostic tests and may prompt additional exposure assesment efforts and toxicological and epidemiological studies. HHE projects also provide human exposure-toxicity data that are used to asses the validity of existing occupational health standards and to support criteria for new standards of recommendation, The HHE request is classified into four categories: 1) category 1: As a administratively invalid, 2) category 2: These are valid requests for which a site visit is not essential to an appropriate response, 3) Category 3 : These are valid requests for which a site visit is necessary for an adequate evaluation, 4) These are valid request which present a complex problem or an opportunity for research, To carry out HHE program one or methods of investigation might be used: 1) direct observation and evaluation of production processes and employee work practices 2) employees exposure level and air contamination level 3) medical test or physical examinations of employees 4) private, confidential interviews with employees 5) review of employer's record of injuries and illness, employee exposure data, medical tests and job histories. After investigation and analysing the data, NIOSH issues a final report, giving finding and recommendation.

• Biomolecules & Therapeutics
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• 제19권3호
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• pp.282-287
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• 2011

Sirt1, a nicotinamide adenine dinucleotide ($NAD^+$)-dependent histone deacetylase, is known to deacetylate a number of proteins that are involved in various cellular pathways such as the stress response, apoptosis and cell growth. Modulation of the stress response by Sirtuin 1 (Sirt1) is achieved by the deacetylation of key proteins in a cellular pathway, and leads to a delay in the onset of cancer or aging. In particular, Sirt1 is known to play an important role in maintaining genomic stability, which may be strongly associated with a protective effect during tumorigenesis and during the onset of aging. In these studies, Sirt1 was generated in stably expressing cells and during the stimulation of DNA damage to examine whether it promotes survival. Sirt1 expressing cells facilitated the repair of DNA damage induced by either ionizing radiation (IR) or bleomycin (BLM) treatment. Fastened damaged DNA repair in Sirt1 expressing cells corresponded to prompt activation of Chk2 and ${\gamma}$-H2AX foci formation and promoted survival. Inhibition of Sirt1 enzymatic activity by a chemical inhibitor, nicotinamide (NIC), delayed DNA damage repair, indicating that promoted DNA damage repair by Sirt1 functions to induce survival when DNA damage occurs.

• 해양환경안전학회지
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• 제15권1호
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• pp.33-39
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• 2009

최근 선박건조기술이 발전했음에도 불구하고 교통량의 증가와 해양레저의 활성화로 사고위험은 더욱 증가하고 있다. 이 논문에서는 그동안 발생했던 해양사고를 분석하여 사고발생을 최소화할 수 있는 여러 가지 방안과 사고발생시 신속하고 구조할 수 있는 체계적인 구조시스템에 대하여 논의한다. 선박이 해상에서 안전하게 항행하기 위해서는 선박기술, 항해관련 장비, 우수한 인적자원, 교통관제 등과 같은 구성요소들이 제도적으로는 구축되어야 하고, 각각의 항행요소들이 유기적으로 작동되어야 한다. 또한 사고발생시 사고수습이 신속하게 진행될 수 있도록 체계적으로 정부조직이 구성되어야 하고 그 조직들이 긴밀한 협력관계를 유지해야 한다. 민간부분에서의 협력지원도 현재보다 더욱 강화되어 국가의 관리영역에서 벗어난 해역에서는 민간부분에서 구조할 수 있도록 민간 구조대가 활성화되어야 한다.